On the dynamical structure of QSOs and the origin of emission clouds

Details On the dynamical structure of QSOs and the origin of emission clouds On the dynamical structure of QSOs and the origin of emission clouds

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..94...31g&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 94, no. 1, July 1983, p. 31-42.

Astronomy and Astrophysics

Astrophysics

1

Emission Spectra, Interstellar Gas, Quasars, Active Galactic Nuclei, Maxwell-Boltzmann Density Function, Seyfert Galaxies, Ultraviolet Spectra

Scientific paper

It is shown that emission lines, first of all the ultraviolet resonance doublet 2800 Mg II, can be used to decipher the internal dynamic structure of QSOs and active galactic nuclei. The electron temperatures of the emission regions of these objects are determined. A hypothesis is proposed explaining the observed broad profiles of the 2800 Mg II line as a summary effect of emission clouds with a Maxwellian velocity distribution. The main physical parameters of emission clouds in QSOs are obtained. A mechanism of formation of emission clouds is suggested: namely, tidal disruption of stars near to a massive compact object.

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